Unlike you, I will skip sarcasm is my reply. The OP was basing his statements on what the authors of the book said, relying on ‘perceived authority’ rather than cast a critical eye at the arguments.
So, in turn, I mentioned Mensa (since this debate is focusing on intelligence) so to counter with perceived authority. I was not insinuating that I am smart, therefore I am right.
Now, have you actually read the book? While I practice what you practice as well (in terms of reading critics… and supporters… of various theories), I found it personally necessary to actually read the book.
In doing such studies based primarily on statistical analysis of social phenomena, one doesn’t need to be an expert in a given subject. Social scientists can study, for example, alcohol use and child abuse without being an expert in either subjects. It’s not like the physical sciences where one would be lost without a sound and thorough knowledge of the sciences.
So many social problems that come about from the individual (out of wedlock childbirth, etc) come from people making bad choices. Certainly this is not at odds with our Christian belief. The study add to the knowledge that we have, and no study is the be-all end-all. Of course, I read everything with a critical eye, even the Bell Curve.